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Finding the Fourth Proportional to 157,359, 217,093.80 and 103,672.20

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Solution

The fourth proportional to 157,359, 217,093.80 and 103,672.20 is: 143,027.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,359 : 217,093.80 = 103,672.20 : x
  2. Step 2: Convert to fraction form
    157,359/217,093.80 = 103,672.20/x
  3. Step 3: Cross multiply
    157,359x = 217,093.80 × 103,672.20
  4. Step 4: Simplify right side
    157,359x = 22,506,591,852.36
  5. Step 5: Solve for x
    x = 22,506,591,852.36/157,359
  6. Step 6: Final answer
    x = 143,027.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.